1891373890560 has 1408 divisors, whose sum is σ = 8407820943360. Its totient is φ = 350355456000.

The previous prime is 1891373890547. The next prime is 1891373890589. The reversal of 1891373890560 is 650983731981.

It is a tau number, because it is divible by the number of its divisors (1408).

It is a super-2 number, since 2×1891373890560² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 1891373890494 and 1891373890503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 382016085 + ... + 382021035.

Almost surely, 2^{1891373890560} is an apocalyptic number.

1891373890560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1891373890560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4203910471680).

1891373890560 is an abundant number, since it is smaller than the sum of its proper divisors (6516447052800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1891373890560 is a wasteful number, since it uses less digits than its factorization.

1891373890560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5033 (or 5015 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 60.

The spelling of 1891373890560 in words is "one trillion, eight hundred ninety-one billion, three hundred seventy-three million, eight hundred ninety thousand, five hundred sixty".